src/df.c

   1 /**
   2  * collectd - src/df.c
   3  * Copyright (C) 2005-2007  Florian octo Forster
   4  * Copyright (C) 2009       Paul Sadauskas
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; only version 2 of the License is applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  *
  19  * Authors:
  20  *   Florian octo Forster <octo at verplant.org>
  21  *   Paul Sadauskas <psadauskas at gmail.com>
  22  **/
  23
  24 #include "collectd.h"
  25 #include "common.h"
  26 #include "plugin.h"
  27 #include "configfile.h"
  28 #include "utils_mount.h"
  29 #include "utils_ignorelist.h"
  30
  31 #if HAVE_STATVFS
  32 # if HAVE_SYS_STATVFS_H
  33 #  include <sys/statvfs.h>
  34 # endif
  35 # define STATANYFS statvfs
  36 # define BLOCKSIZE(s) ((s).f_frsize ? (s).f_frsize : (s).f_bsize)
  37 #elif HAVE_STATFS
  38 # if HAVE_SYS_STATFS_H
  39 #  include <sys/statfs.h>
  40 # endif
  41 # define STATANYFS statfs
  42 # define BLOCKSIZE(s) (s).f_bsize
  43 #else
  44 # error "No applicable input method."
  45 #endif
  46
  47 static const char *config_keys[] =
  48 {
  49         "Device",
  50         "MountPoint",
  51         "FSType",
  52         "IgnoreSelected",
  53         "ReportByDevice",
  54         "ReportReserved"
  55 };
  56 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
  57
  58 static ignorelist_t *il_device = NULL;
  59 static ignorelist_t *il_mountpoint = NULL;
  60 static ignorelist_t *il_fstype = NULL;
  61
  62 static _Bool by_device = false;
  63 static _Bool report_reserved = false;
  64
  65 static int df_init (void)
  66 {
  67         if (il_device == NULL)
  68                 il_device = ignorelist_create (1);
  69         if (il_mountpoint == NULL)
  70                 il_mountpoint = ignorelist_create (1);
  71         if (il_fstype == NULL)
  72                 il_fstype = ignorelist_create (1);
  73
  74         return (0);
  75 }
  76
  77 static int df_config (const char *key, const char *value)
  78 {
  79         df_init ();
  80
  81         if (strcasecmp (key, "Device") == 0)
  82         {
  83                 if (ignorelist_add (il_device, value))
  84                         return (1);
  85                 return (0);
  86         }
  87         else if (strcasecmp (key, "MountPoint") == 0)
  88         {
  89                 if (ignorelist_add (il_mountpoint, value))
  90                         return (1);
  91                 return (0);
  92         }
  93         else if (strcasecmp (key, "FSType") == 0)
  94         {
  95                 if (ignorelist_add (il_fstype, value))
  96                         return (1);
  97                 return (0);
  98         }
  99         else if (strcasecmp (key, "IgnoreSelected") == 0)
 100         {
 101                 if (IS_TRUE (value))
 102                 {
 103                         ignorelist_set_invert (il_device, 0);
 104                         ignorelist_set_invert (il_mountpoint, 0);
 105                         ignorelist_set_invert (il_fstype, 0);
 106                 }
 107                 else
 108                 {
 109                         ignorelist_set_invert (il_device, 1);
 110                         ignorelist_set_invert (il_mountpoint, 1);
 111                         ignorelist_set_invert (il_fstype, 1);
 112                 }
 113                 return (0);
 114         }
 115         else if (strcasecmp (key, "ReportByDevice") == 0)
 116         {
 117                 if (IS_TRUE (value))
 118                         by_device = true;
 119
 120                 return (0);
 121         }
 122         else if (strcasecmp (key, "ReportReserved") == 0)
 123         {
 124                 if (IS_TRUE (value))
 125                         report_reserved = true;
 126                 else
 127                         report_reserved = false;
 128
 129                 return (0);
 130         }
 131
 132
 133         return (-1);
 134 }
 135
 136 static void df_submit_two (char *df_name,
 137                 const char *type,
 138                 gauge_t df_used,
 139                 gauge_t df_free)
 140 {
 141         value_t values[2];
 142         value_list_t vl = VALUE_LIST_INIT;
 143
 144         values[0].gauge = df_used;
 145         values[1].gauge = df_free;
 146
 147         vl.values = values;
 148         vl.values_len = 2;
 149         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 150         sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
 151         sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
 152         sstrncpy (vl.type, type, sizeof (vl.type));
 153         sstrncpy (vl.type_instance, df_name, sizeof (vl.type_instance));
 154
 155         plugin_dispatch_values (&vl);
 156 } /* void df_submit_two */
 157
 158 __attribute__ ((nonnull(2)))
 159 static void df_submit_one (char *plugin_instance,
 160                 const char *type, const char *type_instance,
 161                 gauge_t value)
 162 {
 163         value_t values[1];
 164         value_list_t vl = VALUE_LIST_INIT;
 165
 166         values[0].gauge = value;
 167
 168         vl.values = values;
 169         vl.values_len = 1;
 170         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 171         sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
 172         if (plugin_instance != NULL)
 173                 sstrncpy (vl.plugin_instance, plugin_instance,
 174                                 sizeof (vl.plugin_instance));
 175         sstrncpy (vl.type, type, sizeof (vl.type));
 176         if (type_instance != NULL)
 177                 sstrncpy (vl.type_instance, type_instance,
 178                                 sizeof (vl.type_instance));
 179
 180         plugin_dispatch_values (&vl);
 181 } /* void df_submit_one */
 182
 183 static int df_read (void)
 184 {
 185 #if HAVE_STATVFS
 186         struct statvfs statbuf;
 187 #elif HAVE_STATFS
 188         struct statfs statbuf;
 189 #endif
 190         /* struct STATANYFS statbuf; */
 191         cu_mount_t *mnt_list;
 192         cu_mount_t *mnt_ptr;
 193
 194         mnt_list = NULL;
 195         if (cu_mount_getlist (&mnt_list) == NULL)
 196                 return (-1);
 197
 198         for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
 199         {
 200                 unsigned long long blocksize;
 201                 char disk_name[256];
 202
 203                 if (ignorelist_match (il_device,
 204                                         (mnt_ptr->spec_device != NULL)
 205                                         ? mnt_ptr->spec_device
 206                                         : mnt_ptr->device))
 207                         continue;
 208                 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
 209                         continue;
 210                 if (ignorelist_match (il_fstype, mnt_ptr->type))
 211                         continue;
 212
 213                 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
 214                 {
 215                         char errbuf[1024];
 216                         ERROR ("statv?fs failed: %s",
 217                                         sstrerror (errno, errbuf,
 218                                                 sizeof (errbuf)));
 219                         continue;
 220                 }
 221
 222                 if (!statbuf.f_blocks)
 223                         continue;
 224
 225                 if (by_device)
 226                 {
 227                         /* eg, /dev/hda1  -- strip off the "/dev/" */
 228                         if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
 229                                 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
 230                         else
 231                                 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
 232
 233                         if (strlen(disk_name) < 1)
 234                         {
 235                                 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
 236                                 continue;
 237                         }
 238                 }
 239                 else
 240                 {
 241                         if (strcmp (mnt_ptr->dir, "/") == 0)
 242                         {
 243                                 sstrncpy (disk_name, "root", sizeof (disk_name));
 244                         }
 245                         else
 246                         {
 247                                 int i, len;
 248
 249                                 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
 250                                 len = strlen (disk_name);
 251
 252                                 for (i = 0; i < len; i++)
 253                                         if (disk_name[i] == '/')
 254                                                 disk_name[i] = '-';
 255                         }
 256                 }
 257
 258                 blocksize = BLOCKSIZE(statbuf);
 259
 260                 if (report_reserved)
 261                 {
 262                         uint64_t blk_free;
 263                         uint64_t blk_reserved;
 264                         uint64_t blk_used;
 265
 266                         /* Sanity-check for the values in the struct */
 267                         if (statbuf.f_bfree < statbuf.f_bavail)
 268                                 statbuf.f_bfree = statbuf.f_bavail;
 269                         if (statbuf.f_blocks < statbuf.f_bfree)
 270                                 statbuf.f_blocks = statbuf.f_bfree;
 271
 272                         blk_free = (uint64_t) statbuf.f_bavail;
 273                         blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
 274                         blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
 275
 276                         df_submit_one (disk_name, "df_complex", "free",
 277                                         (gauge_t) (blk_free * blocksize));
 278                         df_submit_one (disk_name, "df_complex", "reserved",
 279                                         (gauge_t) (blk_reserved * blocksize));
 280                         df_submit_one (disk_name, "df_complex", "used",
 281                                         (gauge_t) (blk_used * blocksize));
 282                 }
 283                 else /* compatibility code */
 284                 {
 285                         gauge_t df_free;
 286                         gauge_t df_used;
 287
 288                         df_free = statbuf.f_bfree * blocksize;
 289                         df_used = (statbuf.f_blocks - statbuf.f_bfree) * blocksize;
 290
 291                         df_submit_two (disk_name, "df", df_used, df_free);
 292                 }
 293
 294                 /* inode handling */
 295                 {
 296                         uint64_t inode_free;
 297                         uint64_t inode_reserved;
 298                         uint64_t inode_used;
 299
 300                         /* Sanity-check for the values in the struct */
 301                         if (statbuf.f_ffree < statbuf.f_favail)
 302                                 statbuf.f_ffree = statbuf.f_favail;
 303                         if (statbuf.f_files < statbuf.f_ffree)
 304                                 statbuf.f_files = statbuf.f_ffree;
 305
 306                         inode_free = (uint64_t) statbuf.f_favail;
 307                         inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
 308                         inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
 309
 310                         df_submit_one (disk_name, "df_inodes", "free",
 311                                         (gauge_t) inode_free);
 312                         df_submit_one (disk_name, "df_inodes", "reserved",
 313                                         (gauge_t) inode_reserved);
 314                         df_submit_one (disk_name, "df_inodes", "used",
 315                                         (gauge_t) inode_used);
 316                 }
 317         }
 318
 319         cu_mount_freelist (mnt_list);
 320
 321         return (0);
 322 } /* int df_read */
 323
 324 void module_register (void)
 325 {
 326         plugin_register_config ("df", df_config,
 327                         config_keys, config_keys_num);
 328         plugin_register_init ("df", df_init);
 329         plugin_register_read ("df", df_read);
 330 } /* void module_register */